@InProceedings{BritoNetoArauMendSpyr:2018:CaStMa,
author = "Brito Neto, Francisco Agustinho De and Araujo, Glicia Ruth Garcia
De and Mendes, David and Spyrides, Maria Helena Constantino",
title = "Evaluation of extreme events wind speed on the antarctica
peninsula: case study of marambio argentina station",
booktitle = "Anais...",
year = "2018",
editor = "Herdies, Dirceu Luis and Coelho, Simone Marilene Sievert da
Costa",
organization = "Encontro dos alunos de p{\'o}s-gradua{\c{c}}{\~a}o em
meteorologia do CPTEC/INPE, 17. (EPGMET)",
publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
address = "S{\~a}o Jos{\'e} dos Campos",
keywords = "extreme events, wind speed, antanctica.",
abstract = "Antarctica presents geographic and physical characteristics that
allow the generation of strong winds in the coastal region of the
continent, due to the influence of synoptic systems such as
extratropical cyclones and topography. Therefore, the objective of
the present study is to evaluate the occurrence of extreme events
in wind speed in Marambio Argentina Station, located to the
northeast of the Antarctica Peninsula. Were used daily data of
Surface Atmospheric Pressure in hPa, Wind Speed in m/s, Direction
of the Wind in degrees and Air Temperature at 2 Meters in °C,
kindly provided by the Argentine Antarctica Institute, the period
of January 1979 to December 2015. For evaluate the atmospheric
pattern during the extreme events of the wind speed, the wind data
were used Wind Zonal, Wind Meridional, Air Temperature at 2
Meters, Mean Sea Level Pressure and Geopotential Height of 500
hPa, the was database Era-Interim with a grid spacing 0.75° x
0.75°. To set the threshold that classifies the winds as strong,
we used the 95% percentile variable per month, with the objective
of obtaining 12 thresholds (i.e. a threshold for each month of the
year). The analysis of the period of 1979 to 2015 Marambio
Station, showed that the average value of the Atmospheric Pressure
of 988.87 hPa, however, it was found that the magnitude of such
variable has a negative trend during the period studied. One
possible explanation for such behavior, may be due to the
increased acting of Extratropical Cyclones over the Weddell Sea.
However, wind speed has a daily average of 6.42 m/s
climatological, therefore, possessed during the analysis period a
positive trend in your magnitude. With the most intense winds
identified at the station are from Southwest. Analyzing the
extreme events was identified 680 cases of strong winds,
highlighting the magnitude of 30.40 m/s occurred in July of 1982.
It was found in the composition of atmosphere during the 680 cases
of strong winds was the presence of an Extratropical Cyclone over
the region. It was observed that before and during the Event
Extreme in wind speed, there is an increase in Air Temperature at
2 Meters due to the advection of warmer air caused by the passages
of the Extratropical Cyclones.. Therefore, in this study
identified that during extreme events in wind speed, had presence
of Extratropical Cyclones over the Weddell Sea region.",
conference-location = "Cachoeira Paulista",
conference-year = "22-26 out. 2018",
language = "pt",
organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
ibi = "8JMKD3MGPDW34R/3SR7P7P",
url = "http://urlib.net/ibi/8JMKD3MGPDW34R/3SR7P7P",
targetfile = "TCC01.pdf",
type = "Estudos de Tempo e Clima",
urlaccessdate = "21 maio 2024"
}